Model DBB brakes are spring applied, pressure released, disc style brakes. They develop equal torque in either direction of rotation. Their torque and thermal capacities allow them to be used in the most demanding applications.
Brake construction and operation is shown in the figure. Pressurizing the brake compresses the brake springs and withdraws the clamping plates from the brake discs. Standard brakes are furnished with either one or two discs, which are free to move axially.
Model DBB uses amore conventional piston design to release the brake discs.
The rotating component of the DBB style brake is a very low inertia friction disc core with riveted on friction discs. The low inertia of the rotating components coupled with the high heat sink capacity of the stationary members allow these units to provide superior performance in high cyclic applications. In applications requiring higher speed operation or where precise balance of the rotating components is required, the DBBS style is offered, which utilizes a solid rotor and stationary friction material. Similar to the DBAS design, the DBBS should only be used for applications where brake engagement is non-cyclic.
Torque ratings listed are for brakes with a standard compliment of springs. The quantity of springs can be varied to customize the torque of the brake to suit a particular application. Consult the factory for brake torque of units with non-standard spring configurations.
Brake sizes are indicated by the number of brake discs and the disc diameter in inches. For instance, size 225DBB has two discs 25 inches in diameter. less
Brake construction and operation is shown in the figure. Pressurizing the brake compresses the brake springs and withdraws the clamping plates from the brake discs. Standard brakes are furnished with either one or two discs, which are free to move axially.
Model DBB uses amore conventional piston design to release the brake discs.
The rotating component of the DBB style brake is a very low inertia friction disc core with riveted on friction discs. The low inertia of the rotating components coupled with the high heat sink capacity of the stationary members allow these units to provide superior performance in high cyclic applications. In applications requiring higher speed operation or where precise balance of the rotating components is required, the DBBS style is offered, which utilizes a solid rotor and stationary friction material. Similar to the DBAS design, the DBBS should only be used for applications where brake engagement is non-cyclic.
Torque ratings listed are for brakes with a standard compliment of springs. The quantity of springs can be varied to customize the torque of the brake to suit a particular application. Consult the factory for brake torque of units with non-standard spring configurations.
Brake sizes are indicated by the number of brake discs and the disc diameter in inches. For instance, size 225DBB has two discs 25 inches in diameter. less
Unit of Measure
Features
|
N/A
Low inertia friction disc assembly. |
Specifications
Model |
N/A 325DBBS |
Dimension D |
N/A 17.96 in456 mm |
Dimension D1 |
N/A 12.00 in381 mm |
Dimension D31 |
N/A 1.75 in44 mm |
Dimension D44 |
N/A 0.25 in6 mm |
Dimension D45 |
N/A 1.00 in25 mm |
Dimension H16 |
N/A 11.50 in292 mm |
| Dimension J1 | N/A 30.630 in778.0 mm |
Dimension J1 |
N/A 24.375 in619.1 mm |
Dimension J2 |
N/A 30.89 in785 mm |
Dimension O2 |
N/A 1/2-14 NPT |
Minimum Bore |
N/A 6.13 in156 mm |
Maximum Bore |
N/A 7.38 in187 mm |
Dynamic Torque Rating |
N/A 455000 lb·in51.372 Nm |
Disc & Gear (Inertia) |
N/A 309 lb·ft²1303 kg·m² |
Disc & Gear (Weight) |
N/A 682 lb310 kg |
Housing (Weight) |
N/A 720 lb1585 kg |
| Minimum Releasing Pressure2 | N/A 90 psi6.2 bar |
Maximum Speed |
N/A 1700 rpm |
Manufacturer |
N/A Eaton-Airflex |
Actuation |
N/A Spring Applied, Air Release |
- 1 Tolerance +0.000/-0.005 in (+0.00/-0.08 mm)
- 2 Maximum allowable cylinder pressure is 120 psi (8.3 bar).
